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May 9, 2017

April 2017 Crawl Archive Now Available

Note: this post has been marked as obsolete.
The crawl archive for April 2017 is now available! The archive contains 2.94 billion+ web pages and over 250 TiB of uncompressed content.
Sebastian Nagel
Sebastian Nagel
Sebastian is a Distinguished Engineer with Common Crawl.

The crawl archive for April 2017 is now available! The archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2017-17/. It contains 2.94 billion+ web pages and over 250 TiB of uncompressed content.

Data Type File List #Files Total Size
Compressed (TiB)
Segments segment.paths.gz 100
WARC warc.paths.gz 64700 59.03
WAT wat.paths.gz 64700 19.77
WET wet.paths.gz 64700 8.95
Robots.txt files robotstxt.paths.gz 64700 0.11
Non-200 responses non200responses.paths.gz 64700 0.84
URL index files cc-index.paths.gz 302 0.21
Columnar URL index files cc-index-table.paths.gz 900 0.24

To improve coverage and freshness we ranked all hosts found in the February and March 2017 crawls by Harmonic Centrality, and

  • added 390 million URLs within a maximum of 2 links (“hops”) away from the home pages of the top 16 million hosts;
  • used sitemaps (if provided by any of these 16 million hosts) to take a random sample and add further 160 million URLs.

About 56% of the 2.94 billion URLs overlap with the preceding March 2017 crawl, with 550 million URLs not contained in any crawl archive before.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files. By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2017-17/. For more information on working with the URL index, please refer to the previous blog post or the Index Server API. There is also a command-line tool client for common use cases of the URL index.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact info@commoncrawl.org for sponsorship information.

This release was authored by:
No items found.

Erratum: 

WAT data: repeated WARC and HTTP headers are not preserved

Originally reported by: 
Permalink

Repeated HTTP and WARC headers were not represented in the JSON data in WAT files. When a header was repeated adding a further value of that header, only the last value was stored and other values were lost. This issues was fixed with CC-MAIN-2024-51, see ia-web-commons#18. All WAT files from CC-MAIN-2013-20 until CC-MAIN-2024-46 are affected.

Erratum: 

Erroneous title field in WAT records

Originally reported by: 
Robert Waksmunski
Permalink

The "Title" extracted in WAT records to the JSON path `Envelope > Payload-Metadata > HTTP-Response-Metadata > HTML-Metadata > Head > Title` is not the content included in the <title> element in the HTML header (<head> element) if the page contains further <title> elements in the page body. The content of the last <title> element is written to the WAT "Title". This bug was observed if the HTML page includes embedded SVG graphics.

The issue was reported by the user Robert Waksmunski:

...and was fixed for CC-MAIN-2024-42 by commoncrawl/ia-web-commons#37.

This erratum affects all crawls from CC-MAIN-2013-20 until CC-MAIN-2024-38.

Erratum: 

Missing Language Classification

Originally reported by: 
Permalink

Starting with crawl CC-MAIN-2018-39 we added a language classification field (‘content-languages’) to the columnar indexes, WAT files, and WARC metadata for all subsequent crawls. The CLD2 classifier was used, and includes up to three languages per document. We use the ISO-639-3 (three-character) language codes.